Needle-threader for sewing-machines



A. CORDUAN. NEEDLE THREADER EoR SEWINGA MACHINES.'

APPLICATION FILED APR. 30| I9I9.

Patented A119924, 1920.

A-DoLrH CORDUAN, or Ro'sELLE PARK, NEW JERSEY.

NEEDLE-THREADER FOR ASEVINGr-lVIAC-IIIWIEIS.

:Specification of Letters Patent.

Patented Aug. 24C, 1920.

Application filed April 30, 1919. Serial No. 293,618.

T 0 all whemt may concern Be it known that 1 Anognrn CQRDUAN, a citizenofthe iUnited States, `and a resident of Roselle Park, county of Union,andState of New Jersey, have invented certain new` and usefulImprovements Yin Needle-Threaders for Sewing-Machines, of which fthefollowing is a specification.

This invention relates ,to lan improved needle threader o f the typethat is attached to a sewing machine and which is swung down intoposition to thread the needle when desired, and is returned to aninoperative or out-of-the-way position when released.

The invention is designed to provide a needle threader of this kindwhich is adustable in several directions so that after vbeing attachedto a sewing machine it can be regulated so thatwhen swung into positionthe threading` .hook enters the eye Aof the needle without unnecessarystrain on either the needle or the hook.

The invention is further designed to provide a needle threader ,of thiskind which has the threading hook vheld by securing Lmeans that can beeasily released and a lbroken hook can be quickly removed and replacedby another ,when necessary.

The invention further vprovides for a threading device of this kind Iinwhich the hook is's'o disposed that it does not carry the `loop of thethread lto a point beyond the needle after the needle is'threaded, sothat manual removal is not necessary. In other words, thethreadiscarried through the eye of the needle in threading and released aftermaterial length has been carried through and the thread is notcarried bythe hookup tothe linoperative fposition ofthe threader. 1n factories-wherethese devices are used and but one operator is taking care of manymachines, this is a factor ythat is desirable since Vit is not necessaryto take the time to release the loop from the threading hook.

The invention is illustrated inthe accompanying drawing, in which Figure1 is a front view of the bottom part of the head of a sewing machine,the threader being shown in elevation and the lower part of the sewingmachine needle being shown'in section. Fig. 2 is a side view of theconstruction shownin Fig. 1. Fig. 3 is a bottom view of a bracket whichis part ofthe threading -device and by means of which it is secured tothe presser foot post of the ma chine. Fig. i is a section through thethreading hook and its holder taken on line 4 in Fig. 1, and Fig. 5 is asection through the joint by means of which the arm of the threader ispivoted to the bracket.

For the purpose of illustration I show one form of threading device, butit will be understood that slight modifications can be made in thedisposition and formation of the parts without departing from the scopeof the invention.

1n the drawing 10 indicates the head of the sewing machine, 11 is theneedle bar and 12 is the needle. 13 is the presser foot bar on which thepresser .foot 14 is suspended, these parts as enumerated all being old.and being in substantially the same relative positions in all sewingmachines. My threader is secured to the presser foot 'bar 13 by means.of a bracket, the bracket comprising two members 15 and 16, the member15 'having a sleeve 17 which lits around the presser foot bar and has aflat plate 18 on which the plate 19 of the member v16 is adapted toslide, the plate 1-9 having a disk 20 thereon which cooperates with asimilar disk, as will be hereinafter described.

The 4two members 15 and 1G are adapted to be secured in differentadjusted positions, one form of-fastening being shown and consisting ofthe screws 21 which pass through the slots 22, these slots being longenough to permit a sliding` adjustment when the screws 21 are unscrewed,the screws `when tightened holding these two members 15 and 16 in any`desired adjusted positions. The `bracket can swingV freely on the bar13 and is usually supported by a suitable friction device, such as thespring 23, which abuts at Ione end on the under side of the member 15,and abuts at the otherend on a collar 211 which is fastened in placebysuitable means, such as the screw'25.

Secured to the-bracket is an arm 26 which preferably is made so that itcan be adjusted as to its length, and for this purpose it is made of twoVmembers 2 7 and 23, the inember 27 having a disk portion 29 which abutsagainst vthe disk portion ZO ofthe bracket, these disks 2O and 29usually being rbulged sufliciently to receive a spring 30, which has oneend, as 31, projecting through one end, and the other end, as at 32,projecting through the other disk so that the arm is under tension ofthe spring 30, the two disks being held so that the arm can swing on thebracket by means of a suitable pm or rivet 33.

rlhe members 27 and 28 are arranged telescopically. In the form shown,the member 27 is provided with a slot 34, and a screw 35 passes throughthe slot and is in screwthreaded engagement with the member 28, and inthis way the arm can be adj usted as to its length. The end of the arm28 is provided with a finder 36 which swings on a stud37 which isfastened to the end of the member 28, the finder being adapted 'to havea limited swinging movement, being' limited in one direction by theabutment 38 and in the other direction by the abutment 39. The finder 36has one edge tapered, as at 40, to permit the insertion of the thread inthe hook 42, and its end 41 is rounded so as to g'ive smooth surfaces inall directions, and

alongside of the inclined or tapered side 40,

and projecting slightly beyond it, is the said threading hook 42 withthe extremity 43 formedwith a slight notch or depression to receive thethread, the hook 42 having a pair of openings which fit over the studs44, these studs being secured to the finder 36.

the finder 36 and is adapted to bear with a spring' pressure against thethreading hook 42 and hold it in position, the spring also havingopenings which fit over the studs 44. The end 46 of the fiat spring 45is bent away enough from the hook to provide for getting the finger nailunder it so that it can be pulled out, and in this yway a broken hook fcan be withdrawn and a new hook installed,

the release of the spring permitting it to snap back so as to hold thehook in position. The forward :end of the finder'36 is slightly offsetso that when the finder bears against the side of the needle, thethreading hook is in line with the eye 47 of the needle 12.

When the device .is installed on a maf chine, the adjustment to thefront and rear can be made by unscrewing the screws 21 slightly andmoving the member 16 until the 1 hook 42 is in line with the eye of theneedle,

and by screwing up the screws 2l when the ,adjustment is made, the partsare held in this position. By means of the slot 34 and` the screw 35,the length of the arm can be adjusted so as to bring the threading hookapproximately in position to enter the eye -of the needle whenl the armis swung down to the position shown in dotted outline in the lower partof Fig. 1. It is noted that,`

in the disposition of the parts, when the end of the arm isswungdownward, the curved part of the threading hook, that is, the backof the part 43, is uppermost, and if this curved part engages the upperedge of the eye of the needle, it is swung by such A spring 45 isfastened so as to swing with v slightly rounded part so that theentrance of the hook into the eye of the needle is made easy.

The' abutment 38 prevents excessive inward movement of the finder 36,and consequently the threading hook, and when the arm is swung downwardby the thumb and first finger' of the hand, in which manner it isusually done, the hook is brought in nearly perfect alinement with theeye'of the needle, and as the end of the hook passes beyond the verticalplane passing through the center of .the aivot 33 the threading hookcontinues to pass substantially horizontally because its upper edge isbearing against the upper wall of the eye of the needle and the movementof the threading hook is substantially horizontal and no longer in acurved line.

When the thread is carried under the hook 4 2, thehook is released andthe spring 30 snaps the arm 28 around to the position shown in fulllines in Fig. l, and this pulls the loop of the thread with it.lVhenever released, the arm swings to its uppermost position, and toprevent the hook `and the finder engaging goods passing under the headof the sewing machine, the finder can be swung upward, -as shown indotted outline in the upper part of Fig. 1, so that it lies fairly closeagainst the head of the sewing j machine; When the arm 26 swings upwardit can also be arranged to swing to the rear, so that its normalposition is in back of the head of the sewing machine, `by having theends 48 and 49 of the spring 23 secured in suitable holes in the bracketand in the collar 24, respectively, the hole 50 in the bracket and asimilar hole inthe collar 24 acting to normally twist the bracket, andconsequently the arm` around to a 4position in rear of the sewingmachine head,

A lhen it is swung forward` the bracket is limited in its swingingmovement usually by engagement with a stop, and in the form shown theplate 18 of the member 15 abuts or hits against the needle bar 11 sothat when the threader is swung around to the front until it stops, itis in position with its threading hook in the same vertical plane as theeye of the needle. so that when the arm 26 is swung downward. thethreading hook enters the eye 'of the needle without the necessity ofthe operator making repeated efforts to find the eye of the needle withthe threading hook.

In order to allow for the space between the presserfoot bar 13 and theneedle`r the parts are offset, in theform shown this ofi"- set beingshown at 51 in `theta-rm 28, but it will befunderstood'that other partscan be offset to bring the threading hook over to a position where it isin line 'with the eye or" the needle.. f

If desired, one of the disks,V preferably the disk formed as part of themember 16,

is provided with a projection 52 that has an opening 53, one edge ofwhich is sharpened and which has a converging entrance slot 5A so as toYform a thread cutter.

It will be understood that the collar 24 can be adjusted to make thetension of the spring such as to normally hold the threader in theposition shown in the drawing, that is, in its forward position ready tobe swung down to thread the needle.

lilith the arrangement shown herein of mounting the member or bracket ontheJ presser foot bai', the raising or lowering of the presser foot bardoes not alter the position of the bracket, since it is held by thepressure of the spi-ing in position against the bottom or the head ofthe sewing machine, and whethei the presser 'foot bar is down or upmakes no difference so 'fa-r as the vertical position of the threader isconcerned. lt will be understood that a particular positon for theneedle is preferred, the parts being adjusted so that the needle is inposition to be threaded when it is at its highest point in its path oftravel.

l claim:

l. A needle threader for sewing machines comprising a threading hooksecured on the end of an arm swinging in a vertical plane, a bracket towhich the arm is secured, and means for supporting the bracket so thatit can swing in a horizontal plane.

2. A needle threader for sewing machines comprising a threading hooksecured on the end of an arm swinging in a vertical plane, a bracket towhich the arm is secured, means for supporting the bracket so that itcan swing in a horizontal plane, and means for limiting the swinging ofthe bracket to bring the threading hook in the same plane as the eye ofa needle in the machine.

3. A needle threader for sewing machines comprising a verticallyswinging arm, a horizontally swinging bracket, a spring coniiectionbetween them to normally hold the arm in raised position, the ai'm beingadjustable as to its length, and a threading hook on the free end of thearm and mounted so as to have a limited swinging movement in a planeparallel to the plane of the swinging movement of the arm.

4L. A needle threader for sewing machines comprising a verticallyswinging arm, a bracket to which the arm is pivoted, the brackethaving'a sleeve thereon to surround the presser bar of the sewingmachine, a collar on the presser bar, a spring abutting on the collarand the bracket, and a threading hook mounted on the end of the arm andpointing in a plane parallel to the plane in which the arm swings.

5. A needle threader for sewing machines comprising a bracket made oftwo members slidably arranged and having means for securing them inadjusted positions, one member being adapted to be secured to thepresser bar of a sewing machine, and the other member having a pivotplate, an arm consisting of two members, one member having a pivot plateto be attached to the pivot plate of the bracket, the members of the armbeing slidably secured together and having means for securing them inadjusted positions, a guide pivoted to the free end of the arm, the armhaving a stop so that the swinging of the guide is limited, and athreading hook secured to the guide and substantially parallel thereto,the guide being substantially parallel to the plane in which the armswings.

In testimony that I claim the foregoing, l have hereto set my hand, this26th day of April, 1919.

ADOLPH CORDUAN.

